Method of producing concrete poles



Aug. ze, 1924. Y '1,506,173

H. E. HAGEN ET AL METHOD OF PHOEUCING CONCRETE' PLES Original Filed Nov. 17. 1919 Patented Aug. 26, 1924.

UNITED STATES PATENT OFFICEo METHOD OF PRODUCING CONCRETE POLES.

.Application :filed November 17, 1919, Serial No. 338,570. Renewed February 7, 1924.

T 0 all u1/wm it may concern.'

Be it known that we, HANS ENGELHART HAGEN, civil engineer, and JACOB KJLsnUD, mechanician, citizens of Norway, residing,` at Arendal, Norway, have invented certain new and useful Improvements in Methods of Producing Concrete Poles, of which the following is a specification.

The present invention refers to a reinforced concrete pole or post intended for electrical lines and a suitable way of producing the same.

The invention is shown on the attached drawing in which:

Figure l shows a moulding frame with the reinforcement seen from the side.

Figure 2 is an end view of the same.

Figure 3 shows a modified form of construction seen from the side.

Figure 4 is an end view of this form.

Figures 5 and 6 show the connection be tween the reinforcements in the two halves in two projections standing perpendicularly to each other.

In the Figures l and 2 of the drawing -land -2- indicate the two halves of a moulding frame of a suitable conicity. N3- and 4- are the corresponding core halves. According'. to the Figures l and Qthe reinforcements of the two post halves are manufactured separately and are not connected before the end of the producing. The reinforcements consist of longitudinally ar ranged rods -5- which are mutually connected by means of wire nettings -6-. These nettings have loops 7- which project from the two halves of the moulding frame. The loops of the two halves can be connected with each other by means of special rods -8-. At the producing of the poles the reinforcement of each half post is supported by means of spacing devices -9, whereupon the concrete is filled in. lWhen the concrete is partly stiffened the cores are taken out and both half moulds containing the castings are laid together. The one half mould has pins -l0- with breasts l1- which pins fit into recesses in the other half mould. In this way, when the two half moulds are laid together an intermediate space is formed between the same so that the reinforcement in the one half mould can be connected with the reinforcement in the other half mould by inserting the rods 8- through the corresponding loops -7-. Thereupon the intermediate space is filled up and the pole is finished.

According to Figs. 3 and 4 the moulds l and 2fL are constructed to abut against each other as shown at lb, and the reinforcements 5 and 6ZL form a complete cylinder or a com-- plete prism. Also here the reinforcement is supported by spacing devices 9a. To facilitate driving out of the core 3a, this may, especially with cores of larger diameter, be made up in sections.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is A method of making a hollow concrete pole consisting in placing longitudinally eX- tcnding bars and intertwisted cross-wires in two semi-circular chambers, spacing said bars and wires from the curved surfaces of said chambers, placing concrete in said spaces to form with said bars and wires two half sleeves of reinforced concrete, permitting said concrete to harden, then placing the longitudinal edges of one half sleeve adjacent to the longitudinal edges of the other half sleeve and connecting the cross-wires of one half sleeve to the cross-wires of the other half sleeve, and placinO' concrete over the points of connection to provide a substantially cylindrical hollow pole.

In testimony whereof we a'llix our signatures.

HANS ENQELHART HAGEN. JACOB KJOLSRUD. 

